Liu, L., Kang, L., Chutia, A. , Feng, J., Michalska, M., Ferrer, P., Grinter, D., Held, G., Tan, Y., Zhao, F., Guo, F., Hopkinson, D., Allen, C., Hou, Y., Gu, J., Papakonstantinou, I., Shearing, P., Brett, D., Parkin, I. and He, G. (2023) Spectroscopic Identification of Active Sites of Oxygen-Doped Carbon for Selective Oxygen Reduction to Hydrogen Peroxide. Angewandte Chemie, 135 (21). ISSN 1433-7851
Full content URL: https://doi.org/10.1002/ange.202303525
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Angewandte Chemie - 2023 - Liu - Spectroscopic Identification of Active Sites of Oxygen‐Doped Carbon for Selective Oxygen.pdf - Whole Document Available under License Creative Commons Attribution 4.0 International. 4MB |
| Item Type: | Article |
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| Item Status: | Live Archive |
Abstract
The electrochemical synthesis of hydrogen peroxide (H2O2) via a two-electron (2e-) oxygen reduction reaction (ORR) process provides a promising alternative to replace the energy- intensive anthraquinone process. Herein, we develop a facile template-protected strategy to synthesize a highly active quinone- rich porous carbon catalyst for H2O2 electrochemical production. The optimized PCC900 material exhibits remarkable activity and selectivity, of which the onset potential reaches 0.83 V vs. reversible hydrogen electrode in 0.1 M KOH and the H2O2 selectivity is over 95 % in a wide potential range. Comprehensive synchrotron-based near-edge X-ray absorption fine structure (NEXAFS) spectroscopy combined with electrocatalytic characterizations reveals the positive correlation between quinone content and 2e- ORR performance. The effectiveness of chair-form quinone groups as the most efficient active sites is highlighted by the molecule-mimic strategy and theoretical analysis
| Keywords: | H2O2 electrochemical production, DFT |
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| Subjects: | F Physical Sciences > F100 Chemistry |
| Divisions: | College of Science |
| Related URLs: | |
| ID Code: | 53864 |
| Deposited On: | 27 Apr 2023 10:50 |
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